ASP.NET automatically changes input element name to ctl00$ContentPlaceHolder

The reason is that you are using the master page.
"It was written on an overseas website that ""ClientIDMode="""Static" would be fixed by writing ""ClientIDMode="" in the ContentPlaceHolder."
But writing this doesn't fix it.

I wrote the page directives on the master page, the attributes of the ContentPlaceHolder element, the asp:Content element attribute on the content page, and even the attributes of the input element of the target, but it didn't fix it.

Is there something wrong with the solution?